Sometimes the best medicine is a short, sharp shock; that's why Medtronic's products reside in its customers' hearts and minds (among other places). A leading maker of implantable biomedical devices, the company makes defibrillators and pacemakers that issue electrical impulses or shocks to keep hearts beating normally. Its Cardiac and Vascular Group also produces catheters, stents, valves, balloons, and surgical ablation technologies used to treat vascular and heart disease. The company's Restorative Therapies Group makes nerve and brain stimulation devices, implantable drug delivery systems, products used to manage diabetes, and surgical devices for ear, nose, and throat (ENT) and spinal conditions.